AD 2015-19-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation | Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters |
Unsafe Condition
Separation of the pushrod tube and the control rod end with bearing in the main rotor (M/R) or tail rotor (T/R) pushrod assemblies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect each M/R and T/R pushrod assembly by checking the position of the control rod end in the pushrod tube. Replace the pushrod assembly if the lockwire passes through the inspection hole. If the lockwire does not pass, inspect the jamnut for seating and looseness; replace the pushrod assembly if the jamnut is not seated or loose. Apply two slippage marks across each M/R and T/R pushrod tube and jamnut, regardless of whether the assembly is replaced or passes inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within five hours time-in-service (TIS)
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-76A, S-76B, S-76C, and S-76D helicopters with M/R servo input control pushrod assembly part number 76400-00034-059 or T/R pushrod assembly part number 76400-00014-071 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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